Description: Ward and Burke manufacture Rotating Half-Bridge Scrapers suitable for radial flow settlement tanks ranging in diameter from 6 metres to 30 metres.
These Scrapers will collect primary or secondary sludges to a central hopper for removal and further treatment. Scraper blade design and blade tip speed of rotation are suited to the nature of the sludge to be collected and removed. Scraper blades can be fixed, trailing or hinged, with hinged design selected where reduced blade wear is desired. All scraper blades are removable and renewable.
The basic scraper installation includes, bridge, centre steel tripod, end carriage, diffuser drum and underwater scraper assembly. The half-bridge scraper rotates about a central pivot and the outer end comprises the carriage which houses the bridge drive and wheel assemblies. Scrapers are positioned to create a spiral pattern which directs sludge towards a central collecting hopper.